You can't make an omelet, or so the saying goes, without breaking some eggs. So while it's unfortunate that the restructuring at Bertone means the dissolution of its museum collection, it also means that its contents are going up for auction. And they'll be crossing the block at no less fitting a location than Villa d'Este.

Those in the know will recognize Villa d'Este for the Concorso d'Eleganza held there every year, where the most gorgeous and rare of classic cars mingle with the finest concept cars unveiled throughout the year. This year's concours will mark the first time that RM Auctions will be holding an event at the open-air show on picturesque Lake Como, and in addition to the myriad unspeakably beautiful classics on the docket, RM has just announced the consignment of six concept cars from the Bertone Museum, each one-of-a-kind in its own right and available to collectors for the first time.

The consignment includes the 1967 Lamborghini Marzal, 1970 Lancia Stratos HF Zero, 1963 ChevroletTestudo, 1974 Lamborghini Bravo, 1980 Lamborghini Athon and 1978 Lancia Sibilo. Each was a seminal design for Bertone, and each is expected to fetch well into the six and even seven figures. The Marzal, particularly, which was driven by Prince Ranier and Princess Grace at the start of 1967 Monaco Grand Prix, and the Stratos, the first prototype for the iconic supercar rally machine of the same name, are expected to sell for between €1,000,000 and €1,800,000... that's as much as $2.5 million apiece in equivalent American funds.

Have a look at the collection (sans the Lancia Siblio, images for which are en route) in the high-resolution image gallery below, and follow the jump for the full details in the press release. Hat tip to Sea Urchin!